Admin area & new plans

• Admin area: manage your Gitea or Forgejo instance right from the app – dashboard with key metrics, user management (search, create, edit, block, delete), email directory, runners and jobs including a registration token as a QR code, and maintenance and cron; admin-only and part of Unlimited
• Repository administration in the repo settings: visibility, units, mirror, transfer and delete
• New plans: Unlimited is now available as a monthly subscription or a one-time lifetime purchase, with a revamped paywall and a clear plan picker
• Various refinements and stability fixes